方法一

let list = [{ 
        ids: 1,
        name: '蔬菜',
        children: []
    },
    { 
        ids: 2,
        name: '水果',
        children: [{ 
            ids: 22,
            name: '香蕉',
            children: []
        }]
    }
]
var key = 'childrens'
function parseJson(arr) { 
    arr = arr.slice()
    function toParse(arr) { 
        arr.forEach(function(item) { 
            item.label = item.name
            delete item.name
            if (item.children.length > 0 && Array.isArray(item.children)) { 
                item[key] = item.children
                toParse(item[key])
            }
            delete item.children
        })
        return arr
    }
    return toParse(arr)
}
console.log(parseJson(list))

方法二

let list = [{ 
    ids: 1,
        name: '蔬菜',
        children: []
    },
    { 
        ids: 2,
        name: '水果',
        children: [{ 
            ids: 22,
            name: '香蕉',
            children: []
        }]
    }
]
let stlist = JSON.stringify(list);
stlist = stlist.replace(/\"ids"/g, '"id"');
stlist = stlist.replace(/\"name"/g, '"label"');
stlist = stlist.replace(new RegExp(/(,"children":\[\])/g), '');
console.log(JSON.parse(stlist));